| Experiment | Measurement [10-6] | $\Delta\chi^2$ | Reference | Comments |
|---|---|---|---|---|
| Average | $4.20 \pm0.51$ | |||
| PDG | $4.48 \pm0.47$ | pdgLive | ||
| LHCb | $4.2 \pm0.3 \pm0.4$ | 0.00 | Phys.Rev.D 96,051103 (2017) | $m_{p\overline{p}} < 2.85~\rm{GeV/}c^2$. Multiple systematic uncertainties are added in quadrature. |